The foundation pour for the 66-story Aston Martin Residences is said to be taking place this weekend.
A social media post that has since been deleted said the pour would begin on June 28.
Vertical construction will begin once the foundation is completed, with two tower cranes already in place.
Construction on the foundation began 20 months ago, in October 2017.
When completed, the tower will become the second tallest in Miami at 816 feet above ground.